Strainer device for liquids



Sept. 21, 1943. A. M. GoonLoE 2,329,987

` STRAINER DEVICE FOR LIQUIDS Filed'June' 5o. 1942 f BY d70 ATTORNEY.

Patented Sept. 21, 1943 .Metal Textile Corporation, :West:0range,-N. J., .nfs f a corporation of Delaware 3 i Application Juneso, 1942,.sria1N0-449g120 v L3 oieims. (01.210-7-159) This invention relates to improvements in strainer devices for separating suspended `solids from' lliquids passed therethrough, whereby to clarify or cleanse said liquids for initial orrepeated use. o Y o The invention has for an object to provide a novel construction of strainer 'device equipped with-liquid pervious bag-like filtering means, and means for detachably supportingl the latter 'in operative relation to the cleansed liquid discharge outlets of the strainer device, whereby the same v may be vquickly and easily detached and removed at will for cleansing and replacement.

Therinvention has forv a further object to provide a Inovel construction of strainer device comprising a main casing', having comparativelyv coarse perforate wall sections to admit the' liquid to be strained into its interior with preliminary straining effect to rst remove coarse solid matteri therefrom, and interiorly disposed bag-likek lfiltering means through whichthe preliminary' strained liquid passes with final straining effect to complete the removal of` solid matter com- .'prising'ner solids, means being provided to detachably support said bag-like iltering means with'the open discharge end or ends thereof' in communication with the cleansed liquid'jdischarge means leading out and awayfrom saidmaincasing. o

' The invention has for another object to provide in a liquid strainer device, an open-work` frame insertable within bag-like filter means so as to 1 operatively spread and support, the latter,` said frame including inner and outer clamp means "to engage and grip marginal portions of the mouth end of a bag-like filter means,` and means cooperative with the outer clamp 'means for both moving the same into lter member gripping;re. lation to the inner clamp means, and at the same time aiiixing the frame and its supported lter means in operative relation to a reservoir or casing wall and the cleansed liquid discharge means issuing therefrom.

Other objects of this invention, notat this time more particularly enumerated, will be understood'from the following detailed "description of thesame.

An illustrative embodiment of i this invention is shown in the accompanying drawing, in which:

Fig. 1 is a longitudinal vertical sectional view of -a strainer device according to'ths invention, said section being taken on line i-l in'Fig, 2; and Fig. 2 is a horizontal sectional View of said strainer device, said section being taken on line 2-2 in `Fig.l1.

Y ldrawn on an enlargedV scalegg CII i @Fig.' 3is a transverse sectionalfviewjof'said strainer device,"takenon` line Sj-S'in Fig. 2, but

Similar characters of reference arelemployed in the above described views," to' indicate corre- SppndillgpallS. v l i H v In the illustrative embodiment 'loi strainer device,Y according yto l,this invention, as shownin 'said4 drawing, the Samecmprises anupwardly openA casing formed by a bottom Vwall l0,I perfrate side walls il, a 'perforate end wall l2, and

" anl imperforate oppositev endv/all i3. The 'open top vof saidv casingisnormallyjclosed by a' remov- "able cover member It, which is'vpreferably perforatelvfor4 admission of liquidv therethrough. Thecasing thus providedisof polygonal shape,

i but'it will be understood that it maybe.' made in other shapes if desired.' f Sai'deasingmay' be 'made of any suitable material, such e.V g; as sheet or cast metalgwocd, plastc'material, etc. r

Within the interior of the casing ,arel disposed `one or more filter devices whichY are arranged 'in spaced relation to the perforate walls ofsaid casing, and, if more ythanjonalin'spacedfrelation 'to'ea'ch other. Each` suchiilterdevice comj prises an open-work framej'of suitablef crosssectional'shapa usuallyrectangular, :thesame being formed by an inner clamp collar "I5," "the 'outer marginal portions of which are outwardly and forwardly inclinedv so as "to provide aflared free end portion lli. Aiiixed to* said collarV 15, as e. Vggloy welding the samejthereto, are Vrearwardly extending rlongitudinal frame bars I'Ljdisposed 'to' form the: lateral corners ofthe frame; rSaid framebarsvl 1 are connected together attheir rear ends byftransverse end bars I8. Arranged ltobe f. removablymounted on the frame isa ba'glike j lter element I9, which,r is 'open'at `onefencl but clsed by'faj'bottom portion' 20 at' its'otherend- Said bag-like vlter element maybe made "of any V.suitable ilexiloleliquidperviousk materiaLjpreferably, however, comprising a mesh fabric of selected mesh-,size according to'ithe lparticle size c of solids lsuspended in I and desired tobe removed from; af given liquid' to ber subjected to straining o r iviltering treatment. jlhemeshwalls of the bag-#likelter element may comprisel one or more yns plies of the selected mesh fabric, -althoug'h" for purposes of simplified illustration-'^ the j'iilter ele- `ment walls, as shown in the drawingar'e formed by a single fabric ply. Formanypurposes, ithas been found advantageous to make the bag-like filter element from a metallic meshl fabric knitted from rounder flat wirel and in suitablemesh size. Such knitted metallic mesh is strong an'dfdurable, and is easily ilexed and stretched so as to be eiiiciently spread by the supporting open-work frame when applied thereto. To apply the iilter element ISI- to the frame, the latter is inserted through the open mouth of the former and passed therethrough until its closed bottom end is stopped against the end of said frame. The walls of the lter elementwill be smoothly spread and supported by the frame, so that substantially the entire area of said walls will be exposed to unobstructed passage of the liquid to b'e strained therethrough, and the marginal portions of the mouth end of the lterelement' will be arranged to overlie the inner clamp collar 1I 5fand its flared free end portion I6,'.ready to be vclamped thereto by an outer clamp collar or ring 2| which is passed over the rear end of the frame supported filter element and slid lforvvarduntil it engages said marginal mouth portions Aof the latter, `solas to firmly clamp `orvbindv the same beltween the'inner'and outer clamp collars. 'Prefer- ""ably 'said outer clampfcollarforjring l2I'is flared to conform to the ared' shape of the portions I6 of the inner clamp collar. l y

The frame supported filter elementV is inserted within the interior of the casingfand so vdisposed that `its "openinouthend is causedto abut the imperforate end 'wall I3`thereof, in communication 'with cleansed liquid 'discharge means which is aiiixed'to and leads outwardly from said end wall] I3, releasable Vmeans;cooperative4 with the `outer'clainp collar or ring 2l being provided for drawing to'w'ardand firmlylhoiding and "securing the mouth 'end of said frame supported flter'felement in abutment against said imperio- 'rate end wallof thecasing, while at thesame time strongly urging said outerlclamp collar or ring'ZI toward the ar'ed end' of the innerv 'clamp collar, "whereby no ughny'grip and hold the beg-like eiement ag'ainstshifting or'dsplacerrient from its supporting frame. y I y ,'In a preferredfarrangernent, 'as`shown, a' pluw'frality Nof fraiiesupported filterelements' are provided'in parallel spaced apart relation, and the uterclamp'fcllars orfringslZI therefare in- Afterconiiected: byaftransverse drawlugor earf22 Abridging adjacent "sides thereof. Passed through fsaid drawlug r'ear`22`is a headed boltr23, the trieaoled 'eed of'jwhioh projects through one exteioly ofthe in'iperfiateend'wall' I3 of the casing. -'l ln`-'ea'ded"o'nt'osaid bolt 23 is 'a thumb' nut Ifwl'iich,"when screwed home against theputer 'face of said end wa11'I3g drawsthe outer clamp collarsor rings" 2 I intoillter'ele'rne'ni. clampiug`relation to theirassociated` inrierV clamp Collars I5`I6, vvvl'iile'` at the saine time `drawing the latter into affixed abutment upon the innerl face of saidcasing end wall I3, thus relea'sably holding the open discharge mouths `of the lter lements u in operative communication with lthe "cleansed liquid discharge means whichis'sues from said casing end wall.

l The cleansed uid discharge YAmeans maybe variously constructed, but ordinarily "comprises a discharge `conduit or pipe 25, having 4intake means suitably coupled to and through saidl casing'end 'wall I3. Said discharge conduit or pipef25'may l bel'ed to anyplace atwhich the cleansed liquid vis desired tolseA delivered or utilized,4 and'usually la. suitable pump means (not shwn)` will4 be included inthe line thereof for frcing'circulation ofmthe liquid through Athe filter device. "'When a ,pluralityilir lemeriisef trovddl as liivn pneeirrtaredorhsaid* disgriargeeoriditfor piiiev25 branches 26, each being connected to the casing for communication with the interior of one of the iilter elements.

The interior of each filter element provides a comparatively large capacity plenum or collecting chamber to contain cleansed liquid against which a circulating pump may eciently draw.

It will be obvious thatthe perforate walls of the casing may be provided with perforations of l0 size best suited to act with preliminary straining "eiect upon the liquid entering therethrough into the casing interior, whereby to exclude entrance "of comparatively large solid particles or foreign 'matter-which may be suspended or entrained in `I' the liquid to be strained. The bag-like lter elements will be of selected mesh size best suited to remove all suspended solids from the treated liquid so that the latter is thoroughly strained and' cleansed upon passage therethrough.

The filter elements are easily and quickly removable fr relieving the same' from accumulated `soli`dscollecting thereon inuse. Toie'movel the "lter 'elements for cleansing,y thefthunib nut'24jis removed from the bolt 23, andthe cover'lllis 5 opened togive access to the filter elements.l `Removal `of the thumb nut 24 frees'the'bolt 23 so Ithat thelter devices may be b'acked away from the casing end wall I3,"and thereupon lifted out through the opened top of the casing. 'When the filter devices are thus'removed, the' outer clamp collars or rings 2I `may beV slid rearwardly 'and endwise over the frame supported'filter elements and removed, whereupon, the' mouths of the bagrlike ilterelements IE5-IQ' being freedfsa'id elefments'may be quickly and easilyslippedoffI the frames. 'After removal, the bag-like fllterelements may be thoroughly washed to remove therefrom all solid matter accumulated therein, after which cleansing thesame may be again 40 imounted on their supporting frames, and again returned and operatively assembled within the casing ready for repeated use. u 11; will be apparent that the instant invention "therefore "providesy a very simpleand e'cient strainer device, wherein bag-like filter elements "otmesh fabric Amay be quickly and easily removfablymoun'tedin service position, subject 't'o"`r'e `moial for cleaning andA replacement. I In cases where `no preliminary straining'ef- ,-,Oect' is'desired, thel frame supported bag-like filter "elements may be vdirectly "mounted'yupon 'and tin connection with a liquid reservoir wall incninunicat'ion with the 'dischargev outlet Vof said res- 'Ae'rvoir; in which "case the de'sribed'pe'rrate casing may be eliminated.

` Tlie straierif this' inventionis'especillyiiselfor service in liquid'circulating meswen- `played in connection with 'machine t'o'lsin A4'cnne'ctifon withY the operation of 'which ritis desired "toapplgrg cooling, lubricating `or` other'treating liquidto anoperating tool and theinateralbeing `worked thereby/,so that me liquid thusoiroulted may be ecientiy freed from'a'nyaccmulaton of lint,A chips, dirt or other foreignsubstai'es or Yparticles carried back withy the"liciiid` frorrr the operating tool intothe liquid 'supplyieservirin 'whion :the streinerwouid be submergedsoitat recirculated liquid mustrst pass: therethrough.

It will be understood that soin'e 'cha''ges'may Y be made inthe strainerY device structure'shown trie growing and above deseribedwithout l"delparting from the sfcpev'ofthisinvention' asile- :rineq by` .trie'jfouowmg"elaine` yI1; is therefore intendedl that' all niattr'cntaiii'ed in the: above description or shown in the accompanying "drawv ing shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. The combination With a Wall having cleansed liquid discharge means issuing therethrough of strainer means detachably connected with said Wall, said strainer means comprising a plurality of open-Work frames each having a ared clamp collar at one end thereof, said frames being'ar ranged in parallel spaced relation, a bag-like filter element of mesh fabric adapted to be drawn over each frame so as to be spread and supported thereby, the marginal portions bounding the mouths of said lter elements being disposed to overlie the frame clamp collars, an outer clamp ring cooperative with each frame supported lter element to bind said marginal mouth portions thereof respectively to the frame clamp collars, bridging means connecting adjoining clamp rings, a draw bolt anchored to said bridging means to extend through said Wall, and manipulatable nut means on the bolt operative to both draw said clamp rings into filter element gripping positions and the supporting frames into aixed abutment against said wall, with the open mouths of their supported filter elements disposed in communication with said cleansed liquid discharge means.

2. A strainer structure comprising a casing having a removable cover member vto close the same, certain of the walls of said casing being perforated to pass liquid therethrough into the casing interior, at least one Wall of said casing being imperforate, cleansed fluid discharge means connected to and through said'imperforate Wall to issue fromthe interior of said casing, strainer means adapted to be detachably affixed to said Y imperforate Wall, said strainer means comprising an open-Work frame having a flared clamp collar at one end, a bag-like filter element of mesh fabric adapted to be drawn over said frame soas to be spread and supported thereby, the marginal portions bounding the mouth of said filter element being disposed to overlie said clamp collar,

an outer clamp ring adapted to be passed over the frame supported filter element and disposed to bind said marginal mouth portions thereof against said clamp collar, and releasable holding means cooperative with said imperforate wall and clamp ring adapted to both draw the latter into lter element gripping relation and the supporting frame into affixed abutment against said imperforate Wall, with the open mouth of the supported filter element disposed in communication with said cleansed liquid discharge means.

3. A strainer structure comprising a casing having a removable cover member to close the same, certain of the Walls of said casing being perforated to pass liquid therethroughinto the casing interior, at least one wall of said casing being imperforate, cleansed fluid discharge means connected to and through said imperforate wall to issue from the interior of said casing, strainer means adapted to be detachably affixed to said imperforate Wall, said strainer means comprising, a plurality of open-Work frames each having a iiared clamp collar at one end thereof, said frames being arranged in parallel spaced relation, a bag-like lter element of mesh fabric adapted to be drawn over each frame so as to be spread and supported thereby, the marginal portions bounding the mouths of said filter elements being disposed to overlie the frame clamp collars, an outer clamp ring cooperative with each frame supported iilter element to bind said marginal mouth portions thereof respectively to the frame clamp collars, bridging means connecting adjoining clamp rings, a draw bolt anchored to said bridging means to extend through said imperorate wall, and manipulatable nuty means on the bolt operative to both draw said clamp rings into filter element gripping positions and. 'thesupporting frames into aiiiXed abutment against said imperforatefwall, with the open mouths of their supported filter elements disposed in communication with said cleansed 'liquid discharge means. i

rALFRED M. GOODLOE. 

